一种计及不完备信息的电力系统抑制弧Petri网故障诊断改进模型，保证在出现保护、断路器发生误动、拒动或者警报信息出现丢失、畸变等异常情况时的故障诊断结果的准确性-An account of incomplete information systems inhibit electrical arc Petri nets improved fault diagnosis model, to ensure that in the event of the protection circuit breaker malfunction occurs, tripping or alarm message is lost, the accuracy of fault diagnosis distortion and other anomalies when the